Improvement in steam-boilers for heating by hot air and steam



2 Sheets--Sheef 1.

D. SULLIVAN.

Steam-Boiler for Heat ing.

No. 126,163. Pat-entedApri|3o,1a72.

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2 Sheets-8heef 2 u D. SULLIVAN.

Steam-Boiler for Heating.

Patented April 30,1872.

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DANIEL SULLIVAN, OF BANGOR, MAINE.A

IMPROVEMENT IN STEAM-BOILERS FOR HEATING BY HOT AIR AND STEAM.

Specication forming part of Letters Patent No. 126,163, dated April 30,1872.

To all whom it may concern:

Be it known that I, DANLEL SULLIVAN, of Bf ngor, in the county ofPenobscot and State of Maine, have invented a new and useful Improvementin Steam-Boilers; and I hereby declare the following to be a full,clear, and exact description of the same, which will enable others tomake yand use my invention, reference being had to the accompanyingdrawing forming part of this specification, in which- Figure 1 shows afface view ot' same; Fig. 2, a section; Fig. 3, Plate 2, a perspectiveview of my invention.

v Same letters show like parts.

My invention is designed to increase the ,heating power of steam-boilerswhen applied to heating purposes, and is intended more particularly asan improvement on the boiler described in Patent No. 114,87 6, grantedto me May 16, 1871, though it is capable of use in others of similarconstruction.

In the drawing, A shows the boiler a', the outer cylinder or shell; b,the water-space; c, the water-tubes; d, the inner cylinder; vand e andf, the removable front and back plates, as set forth in the patent abovereferred to, to which attention is called.

My invention aims at utilizing the caloric as well as the steam made bythe boiler. For this purpose I surround the boiler A, which is providedwith the usual pipes for conducting steam through the building, with acasing, g, leaving a space of afoot, more or less, between them. Thiscasingmay beconstructed of brick, wood, or other convenient material,and p'rovided with suitable openings for tending the boiler, admittingcool air, and conducting the same, when heated, to the apartments to bewarmed, by steam-pipes connected with the boiler in the usual manner.

To increase the amount of het air I provide air-tubes h, passing throughthe water-tubes c, through the water-space'b, and secured, by means ofthitnbles or other' suitable device, to the removable plates e f. Thesetubes h are enough smaller than the water-tubes e to permit the waterand steam to surround them,-

"and are open at both ends. The cool air, passing through them the wholelength of the boiler, becomes heated, and its escape being prevented bythe easing g, it rises through the 'conductors i to the rooms to bewarmed. Thus,

may be used, my invention enabling the halls or lower story of a houseto be heated by hot air as if by an ordinary furnace, while the steammay be carried to the chambers. Wvhen the face or back plates of theboiler are to be rcmoved for repairs, the thimbles may be driven out ofthe tubes h at one end, and they may then be drawn out.

j shows the smoke-stack of the boiler. The steam-pipes are of thekindordinarily Vused in all steam boilers and heaters, and are shown at l inthe drawing, Fig. 3, Plate 2.

I do not claim hot-air tubes running through water-spaces, as shown inthe patent of G.

n. Burkhardt october 10,1571, neither do i i claim air-tubes surroundedby a steam-pipe,

as shown in the radiator patented by J. L. Winslow February 7, 1871; nordo I claim, broadly, air-tubes passing through a waterboiler, as seen inthe patent of Hazen Mooers for a hotair furnace. My invention dii'ersfrom all these. It relates to that class of tubular boilers in which thetubes are iilled with water, and is designed to enable buildings to beheated by both steamY and hot air, used independently of each other, butboth generated by the same heating apparatus. i

What I claim as my invention, land desire to secure by Letters Patent,is

1. The combination, in a tubular boilersubstantially of the constructionabove described, of the water-tubes e and hot-air tubes h runningthrough thefsame, and connecting with a hot-air space formed by acasing, g, surrounding the boiler proper, substantially as hereinspecified. 2. v'Ihe combination of a steam-boiler, provided with theordinary steam-pipes l for conducting the steam through the building,with an outer casing, g, and hot-air conductors, t', so arranged as toenable the steam generated by the boiler and the caloric from the tireto be used, independently of each other, for heating purposes,substantially as speciiied.

DANIEL SULLIVAN. Witnesses:

WM. FRANKLIN SEAVEY, JOHN WrLLmius.'

